Home / 19,789.71-27,294.84-12,621.81

Finding the Fourth Proportional to 19,789.71, 27,294.84 and 12,621.81

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Solution

The fourth proportional to 19,789.71, 27,294.84 and 12,621.81 is: 17,408.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,789.71 : 27,294.84 = 12,621.81 : x
  2. Step 2: Convert to fraction form
    19,789.71/27,294.84 = 12,621.81/x
  3. Step 3: Cross multiply
    19,789.71x = 27,294.84 × 12,621.81
  4. Step 4: Simplify right side
    19,789.71x = 344,510,284.46
  5. Step 5: Solve for x
    x = 344,510,284.46/19,789.71
  6. Step 6: Final answer
    x = 17,408.56

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.